New! View global litigation for patent families

US5812116A - Low profile keyboard - Google Patents

Low profile keyboard Download PDF

Info

Publication number
US5812116A
US5812116A US08657703 US65770396A US5812116A US 5812116 A US5812116 A US 5812116A US 08657703 US08657703 US 08657703 US 65770396 A US65770396 A US 65770396A US 5812116 A US5812116 A US 5812116A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
keyboard
key
engaging
members
position
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08657703
Inventor
Satwinder D. S. Malhi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F1/00Details of data-processing equipment not covered by groups G06F3/00 - G06F13/00, e.g. cooling, packaging or power supply specially adapted for computer application
    • G06F1/16Constructional details or arrangements
    • G06F1/1613Constructional details or arrangements for portable computers
    • G06F1/1615Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
    • G06F1/1616Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F1/00Details of data-processing equipment not covered by groups G06F3/00 - G06F13/00, e.g. cooling, packaging or power supply specially adapted for computer application
    • G06F1/16Constructional details or arrangements
    • G06F1/1613Constructional details or arrangements for portable computers
    • G06F1/1633Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1656Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F1/00Details of data-processing equipment not covered by groups G06F3/00 - G06F13/00, e.g. cooling, packaging or power supply specially adapted for computer application
    • G06F1/16Constructional details or arrangements
    • G06F1/1613Constructional details or arrangements for portable computers
    • G06F1/1633Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1662Details related to the integrated keyboard
    • G06F1/1666Arrangements for reducing the size of the integrated keyboard for transport, e.g. foldable keyboards, keyboards with collapsible keys
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F1/00Details of data-processing equipment not covered by groups G06F3/00 - G06F13/00, e.g. cooling, packaging or power supply specially adapted for computer application
    • G06F1/16Constructional details or arrangements
    • G06F1/1613Constructional details or arrangements for portable computers
    • G06F1/1633Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1662Details related to the integrated keyboard
    • G06F1/1667Arrangements for adjusting the tilt angle of the integrated keyboard independently from the main body
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00Casings
    • H01H2223/046Casings convertible
    • H01H2223/052Casings convertible reductible in size, e.g. for transportation
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2233/00Key modules
    • H01H2233/03Key modules mounted on support plate or frame
    • H01H2233/034Snap coupling
    • H01H2233/036Snap coupling with limited freedom

Abstract

A low profile and light weight keyboard for portable electronic devices, such as notebook computers. In specific embodiments, the present invention provides a low profile keyboard 218 where the keycap engaging members 202 extend unobstructed below the back plate or circuit board 204. The travel of the key below the back plate may be eliminated from the overall stowed keyboard thickness by popping up the keyboard or otherwise extending the keyboard to a deployed position having sufficient thickness to accommodate the travel of the engaging members 212 below the base 204.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

The following coassigned patent applications are incorporated herein by reference:

______________________________________Number    Filing Date  Title______________________________________08/594,547     01/31/96     Reduced Layer Keyboard08/627,258     04/03/96     A Low Profile, Lightweight                  Keyboard______________________________________
FIELD OF THE INVENTION

This invention relates to keyboards and keyswitches, and more particularly, to a low profile keyboard which may be used in portable electronic devices such as laptops, notebooks, subnotebooks and pen computers, and other electronic machines that require keyboards.

BACKGROUND OF THE INVENTION

Keyboards or keyswitches are found on nearly every electronic device. Of particular interest herein are keyboards on portable electronic devices such as portable personal computers. Portable personal computers have developed from early luggable "suit case" designs, through the smaller "laptop" design, and now, with the aid of increasingly smaller packaging to "notebook," "sub-notebook" and personal digital assistants (PDAs) such as pen computers.

A "notebook" personal computer is about the size of a conventional loose leaf binder holding letter size paper, and typically weighs about 4-8 pounds. PDAs typically are too small to incorporate a keyboard and therefore often use a pen as the main interface for input. PDAs may weigh less than one pound to about 3 pounds with a screen size of about 5 by 7 inches or smaller. Those portable computers having size, weight and performance lying between the notebook and PDA are typically referred to as subnotebooks. In almost all portable notebook computer models, a keyboard compartment is hinged to a display screen compartment in such a manner that it is possible to fold the display screen compartment down against the keyboard compartment and to latch the two together. PDAs typically are a single enclosure with a screen on the top surface.

A significant portion of the thickness and weight of notebook and subnotebook computers is the keyboard. Low profile switches are sought to reduce the height and weight of keyboards in portable personal computers. Additionally, it is important to users that the keyboard allow typing at a high speed. Two factors are very important to most users: (1) the depth of a keystroke and (2) the feel of the key including the tactile response once the keystroke is complete.

Making keyboards thinner has often involved reducing the depth of the keystroke. Reducing the depth of the keystroke under three millimeters, however, is unacceptable to many users. A keystroke of four millimeters is favored by most users, particularly touch typists, because it is similar in feel to a desktop computer keyboard. Accordingly, notebook computers which reduce height by reducing the depth of a keystroke are likely to be disfavored by many touch typists.

In a coassigned application listed above, U.S. Pat. application No. 08/594,547, a low profile keyboard was disclosed which has a reduced number of layers for implementing a keyboard. Weight and thickness of the keyboard are reduced by having a base with mounts for engaging the key caps rather than the key caps engaging a front plate common to prior art designs.

SUMMARY OF THE INVENTION

This invention provides a lighter and thinner keyboard without sacrificing the functionality for portable electronic devices, such as notebook computers. In specific embodiments, the present invention provides laptops, notebooks and sub-notebooks with a low profile keyboard which can be deployed from a storage position and once deployed have the feel and travel of prior art keyboards while retaining conventional type wobble control. The invention solves the problem of the double thickness needed for wobble control and key retainers in prior art designs by using the circuit board or a bottom plate for catching the cap retainers, and having the retainers extend below the keyboard when depressed. In addition, the keyboard may be popped up to a deployed position so the space for moving the retainers does not contribute to the overall size of the keyboard.

In an embodiment of the invention, a low profile keyboard keyswitch is described which has a key cap having engaging members which extend essentially perpendicularly from the key cap top surface. The engaging members have means for locking the engaging members into a base. The base may be a printed circuit board or a rigid material with a flexible printed circuit. The base layer has holes positioned for slidably retaining the engaging members as the key is depressed by the user. The printed circuit board has electrical traces for generating an electrical signal in response to a keystroke by the user.

In another embodiment, a low profile keyboard keyswitch is described which has a key cap having a centrally located single piston for anti-wobble which extends perpendicularly from the key cap top surface. The base layer has holes positioned for slidably retaining the piston as the key is depressed by the user.

An advantage of the present invention is the space needed to allow the key to travel both above and below the front plate of prior art designs is reduced by essentially one half. The travel of the keyswitch engaging members is now below the base where it is unobstructed. When such as keycap is combined with a deploying enclosure, this additional space may be eliminated from the overall keyboard thickness when the keyboard is in the stowed position. Therefore, using the present invention it would be possible to make a key having a travel of 3 mm while having a stowed thickness of about 6 mm or less.

Another advantage of the present invention is the keyboard keys have more travel for a better tactile feedback over low profile prior art designs by eliminating the double thickness of the key travel in the overall stowed thickness.

The present invention also advantageously combines light and low profile keys with traditional wobble control methods to provide a low cost, low profile keyboard with improved user feel and tactile feedback over prior art designs.

BRIEF DESCRIPTION OF THE DRAWINGS

The novel features believed characteristic of the invention are set forth in the appended claims. The invention itself, however, as well as other features and advantages thereof, will be best understood by reference to the detailed description which follows, read in conjunction with the accompanying drawings, wherein:

FIG. 1 Represents a typical notebook computer of the prior art;

FIG. 2 Represents a cross-sectional view of two adjacent keyboard keys of the prior art;

FIG. 3 Represents a cross-sectional view of two adjacent keyboard keys of the prior art according to the referenced co-assigned application;

FIG. 4 Represents a cross-sectional view of two adjacent keyboard keys of a preferred embodiment of the present invention;

FIG. 5 Represents a cross-sectional view of two adjacent keyboard keys of a preferred embodiment of the present invention;

FIG. 6 Represents a side view of a notebook computer of the present invention.

FIG. 7 Represents a side view of a preferred embodiment of the present invention where the keyboard is on an inclined plane;

FIG. 8 Represents a side view of an embodiment notebook computer showing a mechanism to support the keyboard in the deployed position; and

FIG. 9a-c Represents views of an embodiment notebook computer showing a mechanism to guide and stop the keyboard in the deployed position.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The preferred embodiments of the present invention are best understood by referring to FIGS. 1-9 of the drawings, like numerals being used for like and corresponding parts of the various drawings.

With reference to FIG. 1, there is shown a prior art portable computer 100 of the type commonly referred to as a notebook computer, or laptop computer. Computer 100 includes a housing 102 which is a clamshell type enclosure which includes a top and bottom housing. The top housing includes a screen 104, and the bottom housing has a keyboard 106. The two housings are connected along one edge with a hinge for pivotal movement relative to each other to expose the keyboard and display for use from the closed position. In order to reduce the overall thickness of the combined housings it is desirable to reduce the thickness of the keyboard and its associated housing.

An example of a prior art keyboard key is illustrated in FIG. 2 which represents a cross sections of two keys. In this type of key, a keycap 107 has retainers 108 to engage a front plate 110. When the key is depressed, as shown in the right portion of FIG. 2, contacts on a flexible dome 112 make contact with electrical traces on a circuit board 114. This design suffers from the additional weight needed for the front plate 110 and the thickness of the key includes space for the key travel both above and below the front plate. Therefore it would be difficult to make a key having a travel of 3 mm less than about 9 mm thick using this type of key design.

A second prior art keyboard key from the above referenced, co-assigned application is illustrated in FIG. 3. The front plate in this design has been eliminated by incorporating the retaining means previously in the front plate into the back plate 116. The keycap 118 has retainers 120 which engage to protrusions in the bottom plate 122. Similar to prior art designs, the keycap 118 presses a contact on a flexible cone 124 to make contact between circuit board traces 126. While this design reduced the weight over prior art key designs, it did not significantly reduce the thickness. This key still requires a key thickness that includes space for key travel both above and below the plate used for retaining the key cap.

An embodiment of the present invention is illustrated in FIG. 4 which represents a cross sections of two keys. This embodiment includes a low profile keyboard keyswitch which has a key cap 200 having engaging members 202 which extend essentially perpendicularly from the key cap top surface. The engaging members 202 have means for locking the engaging members into a base 204 such as the hook type projections 206 shown in FIG. 4. The base 204 may be a printed circuit board or a rigid material with a flexible printed circuit 208 attached as shown. The base has holes or openings 210 positioned for slidably retaining the engaging members as the key is depressed by the user. The key may have a flexible dome 211 as used in prior art structures for providing a conductive contact and key return. The printed circuit board 208 has electrical traces for generating an electrical signal in response to a keystroke by the user as is well known in the prior art. When engaging members without locking means are used, the engaging members serve the same purpose as anti-wobble pistons or plungers. In this embodiment, the keycap with non-locking engaging members could be bonded to the flexible dome layer and rely on the bond or other means to remain in position.

The keys according to the present invention not only eliminate the additional weight needed for the front plate of prior art designs, but also has the potential to eliminate the space needed to allow the key to travel both above and below the front plate of prior art designs. Advantageously, the travel of the keyswitch engaging members is now below the base where it is unobstructed. When such a keycap is combined with an enclosure as described below, the space used by the engaging members during actuation 212 may be eliminated from the overall keyboard thickness when the keyboard is in the stowed position. Therefore, using the present invention it would be possible to make a. key having a travel of 3 mm while having a stowed thickness of about 6 mm or less.

Another embodiment of the present invention is illustrated in FIG. 5 which represents a cross sections of two keys. This embodiment includes a low profile keyboard keyswitch which has a key cap 200 having a centrally located piston 203 which extends essentially perpendicular from the key cap top surface. The piston 203 may have retention means for retaining the piston 203 with the base 204 or may be bonded to the flexible dome 211 as shown in FIG. 5. The base 204 may be a printed circuit board or a rigid material with a flexible printed circuit. The base has holes or openings 210 positioned for slidably retaining the key piston as the key is depressed by the user. The key has a flexible dome 211 as used in prior art structures for providing a conductive contact 213 and key return. The printed circuit board 208 has electrical traces for generating an electrical signal in response to a keystroke by the user as is well known in the prior art. The keyboard may also include a rib structure 215 for spacing the flexible layer or flexible domes 211 above the base 204. The rib structure may be a separate layer or integrally formed with the base.

An additional embodiment of the present invention is a keyboard which "pops-up" to a deployed position to allow clearance for said engaging members when deployed but does not allow clearance for said engaging members when not deployed. An illustration of such a keyboard is shown in FIG. 6. This embodiment is a typical clam shell type arrangement where a display enclosure 214 is hinged to a keyboard enclosure 216. The keyboard 218 moves to the shown deployed position after the display and keyboard enclosures are opened up, or the deployment may be automatically initiated by the opening of the enclosures by some mechanical or electrical means.

Other embodiments of the present invention are shown in FIG. 7a and 7b. In these embodiments the keyboard "pops-up" to a deployed position which is in an inclined plane. In FIG. 7a the keyboard 218 pops-up from a housing 216 which has an inclined face 220 as shown. Similarly, in FIG. 7b, keyboard 218 pops-up from a housing 216 at an incline. In this example, the incline may be provided by the rear keyboard support 222 extending upwards further than the front keyboard support.

FIGS. 8a-b illustrate a structure for implementing the pop-up keyboard discussed above. FIG. 8a shows a keyboard 218 is a stowed position in housing 216. The housing 216 includes retainers 224 which may be springably attached to the housing. When the keyboard 218 is deployed as shown in FIG. 8b, retainers 224 engage the keyboard 218 to hold the keyboard in the deployed position. The retainers may include tabs or other means for the user to retract the stops to allow the keyboard to be returned to the stowed position. The keyboard 218 may include springs 225 for "popping-up" the keyboard into the deployed position, illustrated in FIG. 8b. Springs 225 when compressed fit in a recessed area 226 of the housing as shown in FIG. 8a.

The keyboard also may include one or more means for guiding the deployment of the keyboard and retaining the keyboard to the housing in the deployed position. FIGS. 9a-c illustrate an embodiment for a guiding means. In this embodiment, one or more guide pins 230 move in guide slots 232 of housing 216 to allow the keyboard 218 to move up to the deployed position. The guide pins 230 may act as a final stop for the keyboard and also hold the keyboard in lateral position. FIG. 9c shows a top view of guide pin 230 on keyboard 230. The guide pins 230 fit snugly in guide slots 232 to provide lateral confinement.

Electrical connection to the keyboard from the computer electronics, typically located in the lower housing, may be accomplished by a flexible circuit 234 connected to the housing 216 in a recess 236 as shown in FIG. 9b. When the keyboard is stored, the flexible circuit 234 folds into the recess 236. Alternatively, the keyboard connection could use infrared or optical techniques.

It will be apparent to one skilled in the art that there are many variations that could be used for extending the keyboard into the deployed position. Similarly, the key cell can be designed with different types of cone and alignment pin arrangements which are known by those skilled in the art and are contemplated by the present invention.

Claims (15)

What is claimed is:
1. A portable electronic device comprising:
a. a housing;
b. a low profile keyboard associated with said housing comprising:
i) a plurality of key caps having engaging members;
ii) a base layer having openings for slidably guiding said engaging members wherein said engaging members extend below said base a travel distance when pressed by a user of said keyboard; and
iii) electrical traces associated with said base layer for generating an electrical signal in response to a keystroke by the user;
iv) a deployed position and a stowed position for said keyboard in said housing:
wherein said low profile keyboard provides clearance below said base for said engaging members travel distance when said keys are pressed in the deployed position but does not allow clearance for said engaging members travel distance when said keyboard is in the stowed position.
2. The electronic device of claim 1, wherein said electrical traces are on a flexible circuit layer above said base layer.
3. The electronic device of claim 1, wherein said base layer is a printed circuit board and said electrical traces are on said printed circuit board.
4. The electronic device of claim 1, wherein said engaging members have means for locking the engaging members in the base.
5. The electronic device of claim 1, wherein said keyboard further comprises a flexible layer having flexible cones having conductive material to contact said electrical traces when compressed by said keys.
6. The electronic device of claim 1, wherein said keyboard further comprises means for automatic deployment to allow the keyboard to pop-up automatically.
7. The electronic device of claim 1, wherein said base is essentially planer.
8. The electronic device of claim 1, wherein said keyboard pops-up from an inclined top housing surface relative to the bottom of the housing to provide a comfortable typing position for the user.
9. The electronic device of claim 8, wherein said keyboard pops-up to an incline position from a non-inclined, non-deployed position.
10. The electronic device of claim 1, wherein said key engaging members are singular centrally located pistons for each key.
11. The electronic device of claim 1, wherein said key engaging members are two or more engaging members per key located outside at the periphery of said key.
12. The keyboard of claim 1, wherein said keyboard pops-up to an incline relative to the bottom of the housing to provide a comfortable typing position for the user.
13. The keyboard of claim 2, wherein said keyboard pops-up to an incline position from a non-inclined, non-deployed position.
14. A portable electronic device comprising:
a. a housing;
b. a low profile keyboard associated with said housing comprising:
i) a plurality of key caps having engaging members located at the periphery of said key;
ii) flexible cones having conductive material;
iii) electrical traces associated with said base layer for generating an electrical signal in response to a keystroke by the user which brings said conductive material of said flexible cones in contact with said electrical traces;
iv) a base layer having openings for slidably retaining said engaging members; and wherein said engaging members extend below said base a travel distance when pressed by a user of said keyboard; and
v) a deployed position and a stowed position for said keyboard in said housing; wherein said low profile keyboard provides clearance below said base for said engaging members travel distance when said keys are pressed in the deployed position but does not allow clearance for said engaging members travel distance when said keyboard is in the stowed position.
15. The electronic device of claim 14, wherein said engaging members have means for locking the engaging members in the base.
US08657703 1996-05-30 1996-05-30 Low profile keyboard Expired - Lifetime US5812116A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08657703 US5812116A (en) 1996-05-30 1996-05-30 Low profile keyboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08657703 US5812116A (en) 1996-05-30 1996-05-30 Low profile keyboard

Publications (1)

Publication Number Publication Date
US5812116A true US5812116A (en) 1998-09-22

Family

ID=24638316

Family Applications (1)

Application Number Title Priority Date Filing Date
US08657703 Expired - Lifetime US5812116A (en) 1996-05-30 1996-05-30 Low profile keyboard

Country Status (1)

Country Link
US (1) US5812116A (en)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5951178A (en) * 1997-12-29 1999-09-14 Samsung Electronics Co., Ltd. Expandable and compressible keyboard
US5997196A (en) * 1998-12-18 1999-12-07 Silitek Corporation Key structure of computer keyboard
US6019530A (en) * 1998-08-05 2000-02-01 International Business Machines Corporation Keyboards with retractable keys
WO2001040914A2 (en) * 1999-11-30 2001-06-07 Vercel Development Corporation Hand held internet browser with folding keyboard
US20020163451A1 (en) * 2001-05-03 2002-11-07 Johnston Raymond Patrick Liquid proof switch array
US6483051B2 (en) 2000-06-30 2002-11-19 Nokia Mobile Phones Ltd. Method in the manufacture of a keyboard for an electronic device
US6538641B2 (en) * 2000-01-21 2003-03-25 Brother Kogyo Kabushiki Kaisha Key switch device, keyboard with the key switch device, and electronic apparatus with the keyboard
US6587332B2 (en) 2000-06-30 2003-07-01 Nokia Mobile Phones, Ltd. Structure of a housing for an electronic device
US6590565B2 (en) * 2000-04-11 2003-07-08 Kabushiki Kaisha Toshiba Keyboard unit having pop-up key-tops and electronic apparatus incorporating the keyboard unit
US20030184991A1 (en) * 2002-03-27 2003-10-02 Johnston Raymond P. Lighted fastening structure
US20030209416A1 (en) * 2002-05-10 2003-11-13 Yao-Kun Tsai Key cap with multiple-layer structure
US6690360B2 (en) 2001-05-03 2004-02-10 3M Innovative Properties Company Liquid proof switch array
US20040063474A1 (en) * 2002-10-01 2004-04-01 Nec Corporation Foldable handy electronic device
US20040074751A1 (en) * 2002-09-20 2004-04-22 Yamaha Corporation Illuminated switch construction and pushbutton unit for illuminated switches
US6740832B2 (en) 2002-03-27 2004-05-25 3M Innovative Properties Company Apparatus exhibiting tactile feel
US20040228076A1 (en) * 2003-05-13 2004-11-18 Clapper Edward O. Sliding screen emerging keyboard
US20060120029A1 (en) * 2004-12-03 2006-06-08 Gwan-Woo Ryu Portable terminal having protruding keypad
US20060283695A1 (en) * 2004-11-30 2006-12-21 Brother Kogyo Kabushiki Kaisha Information apparatus
US20100134420A1 (en) * 2006-12-01 2010-06-03 Danmarks Tekniske Universitet A keyboard
US20110170250A1 (en) * 2010-01-13 2011-07-14 Bhutani Gurmeet S System and Method for Information Handling System Keyboard Stowage
US20130120275A1 (en) * 2009-04-06 2013-05-16 Quanta Computer Inc. Optical touch device and keyboard thereof
US20140091857A1 (en) * 2012-09-28 2014-04-03 Apple Inc. Ultra Low Travel Keyboard
US9202355B2 (en) 2009-09-30 2015-12-01 Apple Inc. Self adapting haptic device
US9317118B2 (en) 2013-10-22 2016-04-19 Apple Inc. Touch surface for simulating materials
US9501912B1 (en) 2014-01-27 2016-11-22 Apple Inc. Haptic feedback device with a rotating mass of variable eccentricity
US9564029B2 (en) 2014-09-02 2017-02-07 Apple Inc. Haptic notifications
US9608506B2 (en) 2014-06-03 2017-03-28 Apple Inc. Linear actuator
US9652040B2 (en) 2013-08-08 2017-05-16 Apple Inc. Sculpted waveforms with no or reduced unforced response
US9779592B1 (en) 2013-09-26 2017-10-03 Apple Inc. Geared haptic feedback element
US9886093B2 (en) 2013-09-27 2018-02-06 Apple Inc. Band with haptic actuators
US9928950B2 (en) 2013-09-27 2018-03-27 Apple Inc. Polarized magnetic actuators for haptic response
US9934661B2 (en) 2017-05-01 2018-04-03 Apple Inc. Self adapting haptic device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707609A (en) * 1971-10-27 1972-12-26 Texas Instruments Inc Diaphragm pushbutton switch array for keyboards
US5215187A (en) * 1992-01-31 1993-06-01 Acer Incorporated Keyboard membrane keyswitch assembly
US5386091A (en) * 1993-04-08 1995-01-31 Compaq Computer Corporation Low profile keyswitch
US5399824A (en) * 1993-10-27 1995-03-21 Chen; Pao-Chin Computer key switch
US5438177A (en) * 1992-05-06 1995-08-01 Key Tronic Corporation Two-layer membrane switch
US5534891A (en) * 1989-06-08 1996-07-09 Canon Kabushiki Kaisha Electronic equipment having display unit and operation input unit
US5684279A (en) * 1995-09-12 1997-11-04 Key Tronic Corporation Computer keyboard with improved membrane keyswitch structure having deflection concentration feature

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707609A (en) * 1971-10-27 1972-12-26 Texas Instruments Inc Diaphragm pushbutton switch array for keyboards
US5534891A (en) * 1989-06-08 1996-07-09 Canon Kabushiki Kaisha Electronic equipment having display unit and operation input unit
US5215187A (en) * 1992-01-31 1993-06-01 Acer Incorporated Keyboard membrane keyswitch assembly
US5438177A (en) * 1992-05-06 1995-08-01 Key Tronic Corporation Two-layer membrane switch
US5386091A (en) * 1993-04-08 1995-01-31 Compaq Computer Corporation Low profile keyswitch
US5399824A (en) * 1993-10-27 1995-03-21 Chen; Pao-Chin Computer key switch
US5684279A (en) * 1995-09-12 1997-11-04 Key Tronic Corporation Computer keyboard with improved membrane keyswitch structure having deflection concentration feature

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5951178A (en) * 1997-12-29 1999-09-14 Samsung Electronics Co., Ltd. Expandable and compressible keyboard
US6019530A (en) * 1998-08-05 2000-02-01 International Business Machines Corporation Keyboards with retractable keys
US5997196A (en) * 1998-12-18 1999-12-07 Silitek Corporation Key structure of computer keyboard
WO2001040914A2 (en) * 1999-11-30 2001-06-07 Vercel Development Corporation Hand held internet browser with folding keyboard
WO2001040914A3 (en) * 1999-11-30 2002-03-07 Vercel Dev Corp Hand held internet browser with folding keyboard
US6825832B2 (en) * 1999-11-30 2004-11-30 Vercel Development, Inc. Hand held internet browser with folding keyboard
US6538641B2 (en) * 2000-01-21 2003-03-25 Brother Kogyo Kabushiki Kaisha Key switch device, keyboard with the key switch device, and electronic apparatus with the keyboard
US6590565B2 (en) * 2000-04-11 2003-07-08 Kabushiki Kaisha Toshiba Keyboard unit having pop-up key-tops and electronic apparatus incorporating the keyboard unit
US6483051B2 (en) 2000-06-30 2002-11-19 Nokia Mobile Phones Ltd. Method in the manufacture of a keyboard for an electronic device
US6587332B2 (en) 2000-06-30 2003-07-01 Nokia Mobile Phones, Ltd. Structure of a housing for an electronic device
US20020163451A1 (en) * 2001-05-03 2002-11-07 Johnston Raymond Patrick Liquid proof switch array
US7091952B2 (en) 2001-05-03 2006-08-15 3M Innovative Properties Company Liquid proof switch array
US6690360B2 (en) 2001-05-03 2004-02-10 3M Innovative Properties Company Liquid proof switch array
US20030184991A1 (en) * 2002-03-27 2003-10-02 Johnston Raymond P. Lighted fastening structure
US6827459B2 (en) 2002-03-27 2004-12-07 3M Innovative Properties Company Lighted fastening structure
US6740832B2 (en) 2002-03-27 2004-05-25 3M Innovative Properties Company Apparatus exhibiting tactile feel
US20030209416A1 (en) * 2002-05-10 2003-11-13 Yao-Kun Tsai Key cap with multiple-layer structure
US6747226B2 (en) * 2002-09-20 2004-06-08 Yamaha Corporation Illuminated switch construction and pushbutton unit for illuminated switches
US20040074751A1 (en) * 2002-09-20 2004-04-22 Yamaha Corporation Illuminated switch construction and pushbutton unit for illuminated switches
US20040063474A1 (en) * 2002-10-01 2004-04-01 Nec Corporation Foldable handy electronic device
US7457107B2 (en) * 2002-10-01 2008-11-25 Nec Corporation Foldable handy electronic device
US20040228076A1 (en) * 2003-05-13 2004-11-18 Clapper Edward O. Sliding screen emerging keyboard
WO2004102364A3 (en) * 2003-05-13 2005-02-10 Intel Corp Sliding screen emerging keyboard
US6972944B2 (en) 2003-05-13 2005-12-06 Intel Corporation Sliding screen emerging keyboard
CN1784644B (en) 2003-05-13 2012-04-04 英特尔公司 Sliding screen emerging keyboard
WO2004102364A2 (en) * 2003-05-13 2004-11-25 Intel Corporation Sliding screen emerging keyboard
US7572989B2 (en) * 2004-11-30 2009-08-11 Brother Kogyo Kabushiki Kaisha Information apparatus
US20060283695A1 (en) * 2004-11-30 2006-12-21 Brother Kogyo Kabushiki Kaisha Information apparatus
US20060120029A1 (en) * 2004-12-03 2006-06-08 Gwan-Woo Ryu Portable terminal having protruding keypad
US20100134420A1 (en) * 2006-12-01 2010-06-03 Danmarks Tekniske Universitet A keyboard
US20130120275A1 (en) * 2009-04-06 2013-05-16 Quanta Computer Inc. Optical touch device and keyboard thereof
US8803809B2 (en) * 2009-04-06 2014-08-12 Quanta Computer Inc. Optical touch device and keyboard thereof
US9640048B2 (en) 2009-09-30 2017-05-02 Apple Inc. Self adapting haptic device
US9202355B2 (en) 2009-09-30 2015-12-01 Apple Inc. Self adapting haptic device
US8102647B2 (en) 2010-01-13 2012-01-24 Dell Products L.P. System and method for information handling system keyboard stowage
US20110170250A1 (en) * 2010-01-13 2011-07-14 Bhutani Gurmeet S System and Method for Information Handling System Keyboard Stowage
US20140091857A1 (en) * 2012-09-28 2014-04-03 Apple Inc. Ultra Low Travel Keyboard
US9178509B2 (en) * 2012-09-28 2015-11-03 Apple Inc. Ultra low travel keyboard
US9911553B2 (en) 2012-09-28 2018-03-06 Apple Inc. Ultra low travel keyboard
US9652040B2 (en) 2013-08-08 2017-05-16 Apple Inc. Sculpted waveforms with no or reduced unforced response
US9779592B1 (en) 2013-09-26 2017-10-03 Apple Inc. Geared haptic feedback element
US9928950B2 (en) 2013-09-27 2018-03-27 Apple Inc. Polarized magnetic actuators for haptic response
US9886093B2 (en) 2013-09-27 2018-02-06 Apple Inc. Band with haptic actuators
US9317118B2 (en) 2013-10-22 2016-04-19 Apple Inc. Touch surface for simulating materials
US9501912B1 (en) 2014-01-27 2016-11-22 Apple Inc. Haptic feedback device with a rotating mass of variable eccentricity
US9608506B2 (en) 2014-06-03 2017-03-28 Apple Inc. Linear actuator
US9830782B2 (en) 2014-09-02 2017-11-28 Apple Inc. Haptic notifications
US9564029B2 (en) 2014-09-02 2017-02-07 Apple Inc. Haptic notifications
US9934661B2 (en) 2017-05-01 2018-04-03 Apple Inc. Self adapting haptic device

Similar Documents

Publication Publication Date Title
US5841374A (en) Micro word-pad with tactile multifunctional keys
US5555157A (en) Enclosure for electronic apparatus having a cover catch member engageable with two different housing catch members
US5995025A (en) Folding keyboard with sliding segments for electronic products
US6891529B2 (en) Keyboard assembly for a mobile device
US5894406A (en) Elevated separate external keyboard apparatus for use with portable computer
US20050017953A1 (en) Mobile terminal device having foldable functional cover
US5894117A (en) Keyboard switch for notebook type computer or the like
US6798649B1 (en) Mobile computer with foldable keyboard
US5779030A (en) Key board
US5703578A (en) Folding keyboard
US20040228076A1 (en) Sliding screen emerging keyboard
US6560100B1 (en) Portable computer equipped with add-on battery
US5575576A (en) Keyboard
US5774384A (en) Keyboard with elevatable keys
US5751547A (en) Electronic device system including a portable electronic device having a handwriting input device locked to an expansion station when the power switch of the portable electronic device is turned on
US6894626B2 (en) Foldable keyboard
US5569889A (en) Key assembly and keyboard comprising key retraction and stabilization means
US5917906A (en) Touch pad with tactile feature
US5440448A (en) Electronic system with compact card ejector
US20030107549A1 (en) Button key structure integrated with a speaker
US20020126440A1 (en) Miniature keyboard for a hand held computer
US5625532A (en) Reduced height keyboard structure for a notebook computer
US20120287587A1 (en) Surface mountable navigation device with tactile response
US3940758A (en) Expandable keyboard for electronic pocket calculators and the like
US5602715A (en) Collapsible keyboard structure for a notebook computer, responsive to opening and closing of the computer's lid via relatively shiftable key support member and shift member

Legal Events

Date Code Title Description
AS Assignment

Owner name: TEXAS INSTRUMENTS INCORPORATED, TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MALHI, SATWINDER D.S.;REEL/FRAME:008026/0875

Effective date: 19960530

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12